US3523390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elevator door guide
Assignee: Otis Elevator Co
•
Filing: 1968-05-10
•
Granted: 1970-08-11
•
Expires: 1988-05-10
Abstract
No abstract record available.
Inventors
- 👤 John Mcaulay Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:02
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/06; E05D15/0621; E05D15/0626; E05D15/0656; E05Y; E05Y2201/00; E05Y2201/60; E05Y2201/622; E05Y2201/628; E05Y2201/63; E05Y2900/00; E05Y2900/10; E05Y2900/104
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB322905A
Cited
US2149349A
Cited
US2517112A
Cited
US2512148A
Cited
US2684506A
Cited
US3195171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-10 | 1974-02-09 | 1974-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-10 | 1978-02-09 | 1978-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-10 | 1982-02-09 | 1982-08-11 | $7700.00 | Window Closed / Lapsed |